Colburn
mbthod for removing fission products from
a nuclear reactor coolant

ABSTRACT

A METHOD FOR REMOVING CESIUM 137, IODINE 131 AND TRITIUM FROM A LIQUID SODIUM REACTOR COOLANT. HYDROGEN IS INTRODUCED INTO THE LIQUID SODIUM CAUSING SODIUM HYDRIDE TO PRECIPITATE IN A COLD TRAP. THE CESIUM IODINE AND TRITIUM ISOTOPES ARE REMOVED FROM THE LIQUID SODIUM BY COPRECIPITATING AS IMPURITIES IN THE SODIUMM HYDRIDE.

DEFENSIVE PULICATION UNITED STATES PATENT OFFICE Published at the request of the applicant or owner in accordance with the Notice of Dec. 16, 1969, 869 0.G. 687. The abstracts of Defensive Publication applications are identified by distinctly numbered series and are arranged chronologically. The heading of each abstract indicates the number of pages of specification, including claims and sheets of drawings contained in the application as originally filed. The files of these applications are available to the public for inspection and reproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to the merits of alleged invention. The Patent Oflice makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED APRIL 16, 1974 coouNo svsym ems A method for removing cesium 137, iodine 131 and tritium from a liquid sodium reactor coolant. Hydrogen is introduced into the liquid sodium causing sodium hydride to precipitate in a cold trap. The cesium iodine and tritium isotopes are removed from the liquid sodium by coprecipitating as impurities in the sodium hydride.

April 16, 1974 A NUCLEAR REACTOR COOLANT Filed June @551 1 M9365 I 53356 RE 562,206 Em 38 Em \m \v 360 360 2596 f @2308 ozjooo 

